/Engine/Source/Runtime/Engine/Public/Physics/NetworkPhysicsComponent.h
Called after sim step to give the option to rewind. Any pending inputs for the next frame will remain in the queue Return the PhysicsStep to start resimulating from. Resim will run up until latest step passed into RecordInputs (i.e. latest physics sim simulated so far) Return INDEX_NONE to indicate no rewind
virtual int32 TriggerRewindIfNeeded_Internal ( int32 LatestStepCompleted )